- (A) varies with power factor
- (B) varies with speed
- (C) varies with the load
- (D) remains constant at all loads
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- (A) zero
- (B) one
- (C) two
- (D) infinity
- (A) more than the supply voltage
- (B) less than the supply voltage
- (C) equal to the supply voltage
- (D) None of these
- (A) inductor motor torque
- (B) induction generator torque
- (C) synchronous motor torque
- (D) d.c. motor toque
- (E) none of the above
- (A) connected to D.C. supply
- (B) short-circuited by low resistance
- (C) kept open-circuited
- (D) none of the above
- (A) of reducing number of slip rings on the rotor
- (B) armature is associated with large power as compared to the field circuits
- (C) of difficulty of providing high voltage insulation on rotor
- (D) all of the above reasons
- (A) stator supply is relieved of responsibility of producing magnetic field
- (B) mechanical load on the motor can be adjusted
- (C) synchronous motor runs at synchronous speed
- (D) synchronous motor has large air gap
- (A) will refuse to start
- (B) will overheat in spots
- (C) will not come upto speed
- (D) will fail to pull into step
- (A) 10 per cent
- (B) 6 per cent
- (C) 4 per cent
- (D) 2. per cent
- (E) zero
- (A) rotor excitation
- (B) maximum value of coupling angle
- (C) direction of rotation
- (D) supply voltage
